- Standard therapy (chemoradiotherapy and adjuvant temozolomide): Beginning after surgery, patients receive chemoradiotherapy comprising oral temozolomide daily for 6 weeks and radiotherapy once daily, 5 days a week for 6 weeks. Beginning 35 days after completion of radiotherapy, patients receive adjuvant oral temozolomide alone on days 1-5. Treatment with temozolomide repeats every 28 days for 6 courses.